Steam-engine valve.



No. 808,014. PATENTED DEC. 19, 1905. E. T. COPE.

STEAM ENGINE VALVE.

APPLICATION FILED JULY 7, 1904.

UNITED STATES PATENT OFFICE.

EDGE T. COPE, OF SALEM, OHIO, ASSIGNOR TO BUCKEYE ENGINE COMPANY, OF SALEM, OHIO, A CORPORATION OF OHIO.

STEAM-ENGINE VALVE.

Specification of Letters Patent.

Patented Dec. 19, 1905.

Application filed July 7, 1904. Serial No. 215,574.

To all whom, it may concern.-

Be it known that I, EDGE T. Corn, of Salem, Columbiana county, Ohio, have invented a new and useful Steam-Engine Valve, of which the following is a full, clear, and exact descrip tion, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 is a longitudinal vertical section showing the steam-chest of an engine provided with my improved valve. Fig. 2 is a longitudinal section of the main distributionvalve. Fig. 3 is a cross-section of the same through one of the end portions. Fig. 4 is a longitudinal section of the cut-0H valve. Fig. 5 is an end view of the same, and Fig. 6 is a detail view of the cut-oif-valve-stem clamp.

My invention relates to that class of steamengine valves wherein a cylindrical cut-off valve moves within a cylindrical main distribution-valve; and the object of the invention is to provide a light, simple, and cheap construction of this character which will be balanced and give efficient action.

In the drawings, 2 represents the steamchest. having near each end bored-out portions 3 3 with annular channels 4: 4. In these boredout portions are seated the valve-bushings 5, which consist of short cylinders,with annular rows of ports 6 registering with the channel 4, which connects with the ports 7, leading into the cylinder.

lVithin the valve cages or bushings slide the tubular end portions 8 of the main distribution-valve. These hollow end portions are formed with integral closed outer ends 9 and with an intermediate annular row of ports 10. These portions are connected by the stretcher-rods 11, of which I have shown three spaced equidistantly, these rods having collars 12 arranged to fit against the inner faces of the heads 9 and provided with screwthreaded ends having nuts 13. The heads 9 are provided with outer annular recesses, in which are seated the annular cover plates or rings 14, which contact with the ends of packings-rings 15, seated in recesses in the cylindrical ends. The nuts 13 when screwed to place clamp the cylindrical ends in spaced position and at the same time clamp the rings 14., thus holding the end packing-rings in place. Into the head 9 of one of the cylindrical ends is screwed a tubular rod 16, which extends outwardly through stuffing-box l7 and is connected to the actuating mechanism for reciprocating the main valve.

The cut-off valve consists of two short cylinders 0r rings 18, having spiders connected to central hubs 19 at the axial center of the valve. Into one of these hubs is screwed the end of the stem 20, having collars 21, which fit against the hubs, the other end having a nut 22 screwed against the outer end of the other hub. The cut-oif valve is provided with suitable packing-rings 23 and 24.

To prevent turning of the cut-off valve with in the main valve, I providea two-part clamp 25, which is gripped to the central portion of the stem 20 by bolt 26 and has aslottedguide 27, which engages one of the stretcher-rods 11. The cut-ofi'lvalve is actuated by the stem 28, which is screwed into one hub and extends out through the tubular stem 16 of the main valve.

The main valve is provided with packingrings 29 on the opposite side of the ports to the rings 15, and the valves are reciprocated in the ordinary manner, the cut-off valve being controlled by the governor.

The advantages of my invention result from the cheap and simple construction and from the lessening in weight of the valves. The guide on the cut-off valve prevents its rotation, and the heads of the main valve may be cast integral with the tubular portions.

Changes may be made in the form and arrangement of the parts without departing from my invention.

I claim 1. A main steam-engine valve having hollow cylindrical ends with closed heads, stretcherrods extending between and bolted to the heads, and a cut-off valve surrounding said rods and movable within the main valve; substantially as described.

2. A steam-engine valve having two cylindrical end portions with heads, packing-rings for the cylindrical portions held by coverplates on the heads, stretcher-rods between the cylindrical end portions, and a cut-off valve surrounding said rods and movable within the main valve; substantially as described.

3. A main steam-engine valve having a cylindrical end with an annular row of ports and an integral closed head, a packing-ring near the outer end of the cylindrical portion, a clamping plate or ring on the head holding the packing in place, stretcher-rods having nuts arranged to hold the clamping ring or plate in place, and a cut-01f valve movable Within the main valve; substantially as described.

4. In a steam-engine valve, a main distribution-valve having cylindrical end portions, a cut-0E valve having rings movable Within the end portions, stretcher-rods between the end portions of the main valve, a stem be tween the rings of the cut-ofi valve, and an internal guide carried by the cut-01f valve and slidingly engaging a stretcher-rod and preventing rotation of the cut-off valve; substantially as described.

5. A main distribution-valve, a cut-off valve movable therein, and a clamp on the cut-off valve engaging a stretcher-rod on the main valve to prevent rotation of the cut-off valve; substantially as described.

In testimony whereof I have hereunto set my hand.

EDGE T. COPE.

Witnesses:

C. H. VVEEKs, C. F. ToUzIEN. 

